The graph of Kilomax 15 implies not much on-axis HF rise - FWIW - Kappa Pro15LF looks smooth - besides handling lotsa power without severe parameter change from heat (plus lookin' way cool) - how does Kilomax 15 differ in sound from the other Eminence 15" when running in Pi reflex? - does it do "something" which makes it worth the extra $?

Freddy

cheers,

george

The Kilomax drivers are I would have to say nearly identical to the Kappa LFA's in most respects except power handling xmax and frequency response. It's important to weigh your priorities here. The Kappa and the Kilomax have nearly *identical* sensitivity ratings, which means there is little point in paying extra for the kilomax woofers if you can only throw 300-400 watts at each speaker, they won't get any louder. I took a long, hard look at both speakers before I made the purchases... If you have money to burn and 1000 watts per channel on tap, get the kilomax's. If you want to be slightly more economical and practical, go with the Kappa's.

Good luck

Adam

thanks for the detailed reply, What are you using on top, a 2370? - I already own 2-cast frame Eminence from MCM a few years ago - just sitting in their boxes - I think they are essentially 2.5" voice-coil Delta Pro - (also Dayton 295-070 - they don't go high - their curvlinear cones are doped and dust cap kinda large...dunno why they were executed that way)

I'll sure have to check into the Kappa 15LFA - one consideration with solid state amps would be to use 2-15LFA/side (or whatever) stacked tight vertically so a horn can be used on top (D'Apollito may be Ok?) - what do you think of 2-15/side with horn on top? - cost wouldn't be much more - should have some serious "punch". Also - pretty much sure woofers with dissimilar fs can work well in one box --tends to flatten the Z curve (ala' VMPS)

btw - what size box and tuning do you suggest for Kappa 15LFA?

Best wishes!
Freddy

you must be getting some good sound - I don't think a graph tells all the sonic story of a woofer's performance - Eminence's graph shows some rolloff but your Kilomax must be doing ok in the xover region or you wouldn't be so darn happy. I wish Eminence would detail conditions and give off axis data.

btw-I have a Behringer xover but had ground loop problems - will have to sort those out.

I need to locate some of the 1" Russian plywood - hope 84 lumber can order - you got it for only $30/sheet!! - I'd be happy @$50-60 for 5x5 - I'd be in 'box heaven' with 4-6 sheets!

Best wishes!
Freddy

I think your idea for the dual woofers would be a great one, especially the MTM config. I considered this myself, but I came to the conclusion that four smaller speakers would be better then putting everything into two giant ones. Mine are for medium to large sized dances though, so your situation probably doesn't apply like mine did. The two of them in parallel should net you 3 db more sensitivity, and 6 db more if the amp will double it's power output with the new load. They will be large cabinets, but no larger then a pair of single woofer 10 pi's.

I tuned my Kappas to 40 Hz in a 5 cuft ported box. The result was very flat response down to 40 Hz, with an f3 of 36-37 Hz. Anything lower will get you flat, unresponsive bass and anything higher will start to be boomy and peaky.

Good luck!

Adam

I built these speakers for my high school using the Kappa 15LFA and the PSD 2002 compression driver on an exponential horn... Very loud. The crossover needs tweaking, though. There isn't enough horn attenuation and it's too overbearing. I didn't see it as a problem at first, but after listening to them in use at the actual school in various settings, they need an adjustment. The crossover is virtually identical to Wayne's, except there isn't the HF compensation cap.

Adam